(a) A sanitary defect at a public drinking water supply system that obtains its water supply from underground sources shall be immediately corrected.
(b) A public drinking water supply system furnishing drinking water from underground sources may not be established in a place subject to possible pollution by floodwaters unless the system is adequately protected against flooding.

(c) Suction wells or suction pipes used in a public drinking water supply system must be constantly protected by practical safeguards against surface and subsurface pollution.
(d) Livestock may not be permitted to enter or remain in the wellhouse enclosure of a public drinking water supply system.
(e) Public drinking water distribution lines must be constructed of impervious materials with tight joints and must be a reasonably safe distance from sewer lines.
(f) Water from a surface public drinking water supply may not be made accessible or delivered to a consumer for drinking purposes unless the water has been treated to make it safe for human consumption. Water treatment plants, including aeration, coagulation, mixing, settling, filtration, and chlorinating units, shall be of a size and type prescribed by good public health engineering practices.
(g) A clear water reservoir shall be covered and be of a type and construction that prevents the entrance of dust, insects, and surface seepage.